Maximizing E-Tailers’ Sales Volume through the Shipping-Fee Discount and Product Recommendation System

Table 1

Model parameter.

Variable name	Description
	The number of potential customers
	The maximum number of products that can be recommended
	The product (with shipping-fee discount)
	The price of the product
	The cost of the product
	Customer’s reservation price of product
	The current shipping fee of product
	The cost of shipping fee
	Customer’s reservation price of shipping fee
	The set of substitutes of product
	The substitute of product ,
	Total number of substitutes for product
	The price of product ,
	The cost of the product
	Customer’s reservation price of
	Customer’s reservation price of product with recommendation
	The set of complements of product
	The complement of product ,
	Total number of complements for product
	The price of product ,
	The cost of the product
	Customer’s reservation price of product
	Customer’s reservation price of product with recommendation
	The set of independent products of product
	The independent product relative to product ,
	Total number of independent products relative to product
	The price of product ,
	The cost of product
	Customer’s reservation price of
	Customer’s reservation price of product with recommendation
	Discount demands of shipping fee in sales volume
	Profit gains from customers